Term
| How long do MAA particles stay in the lungs and how (by what means) are they removed? |
|
Definition
| 4-6 hrs, removed by blood pressure/breathing |
|
|
Term
| Name 3 RP's that can or have been used for bone scans. |
|
Definition
| Tc-MDP (Medronate), Tc-HDP (Oxidronate), Tc-PYP (Pyrophosphate) |
|
|
Term
| What is the recommended dose range for a bone scan? |
|
Definition
|
|
Term
| What is the recommended dose-to-scan interval for Tc-MDP? |
|
Definition
|
|
Term
| How does cellulitis appear on a bone scan? |
|
Definition
| Increased blood flow, normal delays |
|
|
Term
| Name 3 indications for a 3-phase bone scan. |
|
Definition
| AVN, osteoarthritis, osteomyelitis, cellulitis, rheumatoid arthritis, to evaluate prosthesis, stress fractures |
|
|
Term
| What is different about the procedure for a delay image for AVN? |
|
Definition
|
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Term
| Describe a "flare reaction" on a bone scan. |
|
Definition
| Mets appear to have gotten worse (increased uptake) in light of clinical improvement. Represents repairing and healing. |
|
|
Term
| What is the sensitivity of a bone scan in the diagnosis of mets? |
|
Definition
|
|
Term
| How long does it take for a new bone fracture to appear on a bone scan? |
|
Definition
|
|
Term
| What is the most common reason for a stat lung procedure? |
|
Definition
| To rule out Pulmonary Embolism (PE) |
|
|
Term
| What is the most important view (usually) for a lung perfusion scan? |
|
Definition
|
|
Term
| What is the best position to inject the RP for a lung perfusion? Why? |
|
Definition
| Supine, to negate gravity |
|
|
Term
| What is the dose range for Tc-MAA for a lung perfusion scan? What would it be lower? |
|
Definition
| 2-6mCi; For pulmonary hypertension or pediatrics |
|
|
Term
| What could cause liver localization during a lung ventilation? |
|
Definition
|
|
Term
| What is the major cause of pulmonary emboli? |
|
Definition
| DVT - Deep Vein Thrombophlebitis |
|
|
Term
| What are the superior and inferior portions of the lungs called, respectively? |
|
Definition
|
|
Term
| How is Tc-DTPA administered for a lung ventilation scan? |
|
Definition
|
|
Term
| Describe the outcome fo a chest x-ray, a lung ventilation and a lung perfusion if a patient has PE. |
|
Definition
| Normal x-ray; Normal ventilation, Abnormal Perfusion |
|
|
Term
| What is the typical range of particles for a lung perfusion scan? (Including reduced doses for Pulmonary Hypertension) |
|
Definition
| 75000 - 700000 (Up to 1mil, according to Lori) |
|
|
Term
| What percentage of capillaries is blocked when performnig a lung perfusion scan? |
|
Definition
|
|
Term
| What is the typical dose range inhaled by the patient during an aerosol ventilation? What's the RP used? |
|
Definition
|
|
Term
| Describe a "super scan" (bone scan). What causes it? |
|
Definition
| Increased bone uptake; decreased kidney/bladder uptake; Caused by impaired kidney function |
|
|
Term
| Why are quantitative lung scans performed? |
|
Definition
| To evaluate lung function prior to resection (surgery). |
|
|
Term
| What percentage of MAA particles are extracted by the pulmonary capillaries during the first pass through the blood stream? |
|
Definition
|
|
Term
| What is the particle size for Tc-99m-MAA? What Quality Control procedure is performed for this at the pharmacy? |
|
Definition
| 10-90um; Observe the MAA under a microscope, the slide has a grid on it and the particles can't be LARGER than a square. |
|
|
Term
| What is the method of localization for a DTPA lung ventilation? |
|
Definition
| sedimentation and gravity |
|
|
Term
| What is the method of localization for a Tc-MAA lung perfusion? |
|
Definition
|
|
Term
| What is the method of localization for a Xe-133 lung ventilation? |
|
Definition
|
|
Term
| Describe the "Halloween Mask" phenomenon and what causes it. |
|
Definition
| Increased uptake in the skull, caused by Paget's Disease |
|
|
Term
| What percentage of decalcification must occur before it would appear on a bone scan? |
|
Definition
|
|
Term
| How do stress fractures appear on a 3-phase bone scan? |
|
Definition
| Normal flow, normal pool, increased uptake on delays |
|
|
Term
| How many parathyroid glands do most humans have? |
|
Definition
|
|
Term
| Shat is the recommended dose range for an I-123 thyroid scan? |
|
Definition
|
|
Term
| What are 2 ways to measure background counts for a thyroid uptake? |
|
Definition
| Over the patients thight or aimed at the neck while the patient holds a piece of lead. |
|
|
Term
| What is the RP used for a parathyroid scan? What is the dose range? |
|
Definition
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